Granular permissions for Users

Although WoltLab has many options to alter the permissions for forums and usergroups, the options of altering a individual user are limited as far as I can see. As an example, I want to remove the use of the conversation function from one of my members, but the only way I can do that, as far as I can tell, is to place them in a separate usergroup with the correct permissions set for that user group.

Can WoltLab consider allowing full granular user permissions, please?